On Fri, Apr 13, 2007 at 08:53:28AM +0100, Steve Woodford wrote:
> Most newer ARM CPUs give the option of relocating the vector table into 
> what is traditionally the kernel's VM region, thus simplifying things 
> for the OS.

Additionally, ARM-based CPUs that support FCSE (Fast Context Switch
Extension, IIRC) require support for vectors in one location (I it
requires low, but I'm not sure off-hand since I've only skimmed
discussion of it, and that was a while ago).  FCSE is not so
interesting for general-purpose NetBSD as it rather severely limits
a process's virtual address space (see archives for some discussion
of this), but presumably is interesting for a number of embedded
systems.

-allen

-- 
Allen Briggs  |  http://www.ninthwonder.com/~briggs/  |  briggs@ninthwonder.com